Where are bile salts and vitamins from food absorbed into the bloodstream?
a. duodenum
b. jejunum
c. ileum
d. pancreas
c. ileum
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Which of the following is TRUE about the
spores of seed plants?
a. megaspores develop into female gametophytes b. meiosis produces four megaspores c. microspores enlarge to become megaspores d. megaspores are diploid cells e. microspores undergo meiosis to form four pollen grains
Since newborns have an underdeveloped ____, it is important to monitor their diet and exposure to environmental
chemicals.
a. taste buds b. basilar membrane c. somatosensory cortex d. statocysts e. blood-brain barrier
One of the pyrimidine bases in a DNA molecule is adenine
__________________ Indicate whether the statement is true or false.
Swollen lymph nodes signal infection and result from increased numbers of ________ that build up in the lymph nodes
Fill in the blank(s) with correct word